Questions tagged [z-test]

The z-test is a statistical test for hypothesis testing that uses the standard normal distribution as the sampling distribution of the test statistic. A common example is the test for the difference of two proportions.

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what type of statistical test should i conduct?

I have data of past 3 years where i have every day sales of my product in my country. Now i want to conduct a test that can observe the difference in sales because of holiday period(almost 7 to 14 ...
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McNemar or z-test?

I'm doing a matched sample evaluation to see if there is a statistical difference in graduation rates at a college for total sample and sub-groups within the sample after a policy change intended to ...
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Comparing percentages of incorrect answers - is a t-test appropriate?

In my study, I asked participants to recognize an emotion (they were listening to an audio recording). Only one answer was correct, but the response scale included seven options. I calculated total ...

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